Table 1.

Chronic stress impaired the fertility of male mice

Group	Number of female mice	Pregnant females
		n	%	Time (month)
Control	8	8	100	1
Stressed	8	0	0	1***
		1	12.5	2
		8	100	3

Four male mice of each group were used for this experiment. Within one-month observation time window, the control male mice impregnated all the female mice, while the stressed male mice impregnated 0 female mice.

^***p<0.001, Wilcoxon rank-sum test.